Parents and children do their eternal dance of mutual misunderstanding in two of this week’s best films; the rest range from a gentle romantic fantasy to a cautionary apocalyptic tale. Boyhood In 2002, writer-director Richard Linklater wrote a script about a young boy’s life from age 6 to his late teens. He filmed it over the ensuing 12 years, letting his actors literally grow into their parts. Sure, the nearly three-hour Boyhood could stand some trimming, but it’s …